Burner for finely-divided fuel



Oct. 5 192m v, .y T. a. sTrLLMAN BURNER FOR FINELY DIVIDED` FUEL Filed'Nov.- 14', 1923 1 im, Hl l w mw v y ai woox commits', or Bayonne,

recano NEW .innsnr, AssIeNon To `refr. Hancock New JERSEY, a CORPORATION or nirwana- ,nUnNna :son umani-ontzien sont.. l

lApplication med November 14,1923. Serial No. 874,614.

,I My present invention relates to construe tions adapted for use in connection with burners for finely divided fi1e1,'. such asoilA burnersorpulverized fuel'burners, in v'vhich the fuel is projected through openings in the furnace wall and simultaneouslyimixed with combustion air..

My invention will be best understood from the follovingdescri tion nd the annexed drawings,'in which ig. 1 's 'a verticalsection through an-illustrative embodiment of my invention, and Fig. 2 is a front view of Fig. 1- with a portion of` some of the parts removed to show the construction.

Like reference characters' indicate like parts in the diii'erent views.

In theillustratiw embodiment, 10 is an -oil burner tube carrying an impeller plate 11 on its inner end, The tube 1() projects toward an opening formed in the furnace wall 12, which, i'n the form.V illustrated, is surrounded by a special refractory 13 engaging a fixed cast-iron lining 14, thislining 14C also being held in place by the edges of the boiler casing 15. The lin/ing 14 supports and centers the cast cone member 16, the in;k terior of which has/afrusto-conical opening, this .interior also being provided with angled blades 17 Yand a projecting flange-18 engaging With the exterior of the boiler casing 15.

An air duct to supplyair to the interior ofthe east member 16 and consequently to ing therein.

the fuel projected from the burner 10, is formed by a sheet metal casing connected to the boilercasing 15, only a portion'of this duct adjacent to the opening in the `furnace Wall being shown, and having side walls 19 and a fronti plate 20, air being supplied either from below or 'above and controlledby dampers 21 pivoted in the side Walls 19.

In the front plate 20 of the duct is an opening largerthan any diameter of the cone member 16, this opening being covered by a cover plate 22, the outer Hange-like portion of which extends over the edges of the opening' in the cover 20 and being bolted thereto by bolts 23, so that When these .bolts are removed, the cover plate 22 may be removed from the duct to expose the open- The coverfplate 22 is provided with a central boss 24 which carries the burner tube 10 in the usual manner, so th'atthe latterl maybe adjusted therein longltudinally of the tube and also with a series of inwardly proJecting webs 25 preferably shaped as shownv best at the right of Fig. 2. Fastened to these webs 25 and'projecting' across the duct ltoward the conical member 16 are a plurallty of blades. 26 spaced' apart at their outer ends and curved as 'shown best inthe left-hand portion of Fig. 2, so that air entering the duct will be directed into the conical member 16 through the openings formed between the blades 26 and, at the ,same time, will be given a whirling motion around the axis of the burner tubev 10,. In the specific arrangement, the inner edges of the blades 26 are connected by a ring 27 of sheet metal so asto form a unitary struct-ure. The inneredge of this sheet metal ring. 27 contacts with theYeXterior surface of the flange 1,8.of the conical member 16 and, as will be clear from an inspection of Fig. 1, when the cover plate 22 is held in place by the bolts 23, the

the right of Fig-1, the blades being W'ithldrawn through the opening in the plate 2O with the burner l0, and when thel blades 26 and the,.eover plate 22 are thus removed, theconioalmember 16 may also .be Withdrawn through 'the opening in thecover 20. By the arrangement described, it Will be obvious that'a single set of bolts 23 serve to hold all of the parts in position and yet all of the parts may be remdved through the front cover plate of the duct AWhen such boltsare removed without disturbingv anyother portion of the duct. This easy access to' pa is facilitated by placing the dampers 21 and their operating parts in the ducts outside of the parts used for giving the air the desired whirling motion.

lVliile I have shown my invention as applied to an oil burner'construction, it will be obvious that it maybe used With-any other form of burner and that as many of such burners may be placed across the boiler as desired and disposed of in any one of Ya number of Ways. It Willalso be understood )that many o1 the features of the illustrative loo form of my invention may be varied Without departing from my invention. Thus the Webs 25 need not be curved, as shown, al-

though I find this is desirable in order to assist in maintaining the blades 26 at the desired curvature. The reinforcin band 27 may be also dispensed with, i desired.'

Furthermore, if desired, the blades 26 may`l be dispensed with and any ordinary straight members be used to extend across the duct between the 'cover plate 22 and lthe inember 16. Z

l. A furnace Wall having an opening therein, a cast member iitting said opening,\ a fixed casing spaced from the outside of thewall to form a duct, the outer Wall of said casing having an opening concentric with said furnace Wall opening and large enough to permit said cast member to pass therethrough, a cover plate for said opening in the casing having a fiange contacting with the exterior of the casing, bolts passing through said iange and the casingand airdirecting blades connected to said cover plate and extending through said opening in the casing toward` and against the exterior of said cast member to hold it in said furnace wall opening, and a burner for nely divided fuel extending through said cover plate toward said furnace Wall opening.

2. A furnace. ywall having an opening therein, a cast member fitting said opening, a fixed casing spaced from the outside of the wall to form a duct, the outer Wall of said casing having an opening concentric with said furnace Wall opening andA large enough -to permit said cast; member to pass therethrough, a cover plate for said opening in the casing having a iange contacting with the exterior of the casing, bolts passing through said flange and the casing, air-d1- recting blades connected to said cover plate and extending through said opening in the casing toward and against the exterior of said cast member to hold it in said furnace wall opening, a' burner for finely divided fuel extending through said cover plate tovward said furnace Wall opening, said blades being curved to give air flowing through said duct a rotary motion asit passes inte said furnace Wall opening, and anges on. the inner side of said cover. plateI and proj jecting through said opening in the casing to support the edges of said blades. 4

3. A furnace Wall having an opexjjjullg` thereina'a Cast member fitting said opening,v

a fixed casing spaced from the outside of thel wall to-form a duct, the outerwall of said casing having an opening concentric with said furnace wall opening and large enough to permit said cast member to pass therethroughfa cover plate for said opening in the casing, removable .'fastenings tov hold said cover plate to said casing, air-directing l( blades connected to said cover plate and exi-viv* tending through said opening in the casing;

toward said cast member, and a burner for finely divided fuel extending through said cover plate toward said furnace wall openthe opening in said casing when said cover ing, said casting being removable through plate is removed.

4. A furnace wall having an opening a fixed casing spaced from the outside yof the wall to form a duct, the outer wall of.`

said casing having an opening concentric with said furnace wall opemng and large 'ze therein, a cast member t-ting said Opening,

enough to permit said cast member to pass THOMAS B. STILLMAN. 

